Internal compiler error: cannot convert ReEarlyBound(0, 'a) to a region vid #72242
Description
During the compilation of the below code:
use std::marker::PhantomData;
struct S<'a>
{
m1: PhantomData<&'a u8>,
m2: [u8; S::size()],
}
impl<'a> S<'a>
{
const fn size() -> usize { 1 }
fn new() -> Self
{
Self
{
m1: PhantomData,
m2: [0; Self::size()],
}
}
}The compiler panicked with the following error(s):
Stable:
error: internal compiler error: src/librustc_mir/borrow_check/universal_regions.rs:754: cannot convert `ReEarlyBound(0, 'a)` to a region vid
thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:875:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: rustc 1.43.1 (8d69840ab 2020-05-04) running on x86_64-unknown-linux-gnu
note: compiler flags: -C debuginfo=2 -C incremental --crate-type lib
note: some of the compiler flags provided by cargo are hidden
error: aborting due to previous error
Nightly:
error: internal compiler error: free_scope: DefId(0:9 ~ bugr[a70b]::{{impl}}[0]) not recognized by the region scope tree for None / Some(DefId(0:12 ~ bugr[a70b]::{{impl}}[0]::new[0]))
thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', src/librustc_errors/lib.rs:366:17
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: rustc 1.45.0-nightly (a74d1862d 2020-05-14) running on x86_64-unknown-linux-gnu
note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type lib
note: some of the compiler flags provided by cargo are hidden
Meta
rustc --version --verbose:
Stable:
rustc 1.43.1 (8d69840ab 2020-05-04)
binary: rustc
commit-hash: 8d69840ab92ea7f4d323420088dd8c9775f180cd
commit-date: 2020-05-04
host: x86_64-unknown-linux-gnu
release: 1.43.1
LLVM version: 9.0
Nightly:
rustc 1.45.0-nightly (a74d1862d 2020-05-14)
binary: rustc
commit-hash: a74d1862d4d87a56244958416fd05976c58ca1a8
commit-date: 2020-05-14
host: x86_64-unknown-linux-gnu
release: 1.45.0-nightly
LLVM version: 9.0
Backtrace
Stable:
error: internal compiler error: src/librustc_mir/borrow_check/universal_regions.rs:754: cannot convert `ReEarlyBound(0, 'a)` to a region vid
thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:875:9
stack backtrace:
0: backtrace::backtrace::libunwind::trace
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/libunwind.rs:86
1: backtrace::backtrace::trace_unsynchronized
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/mod.rs:66
2: std::sys_common::backtrace::_print_fmt
at src/libstd/sys_common/backtrace.rs:78
3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
at src/libstd/sys_common/backtrace.rs:59
4: core::fmt::write
at src/libcore/fmt/mod.rs:1063
5: std::io::Write::write_fmt
at src/libstd/io/mod.rs:1426
6: std::sys_common::backtrace::_print
at src/libstd/sys_common/backtrace.rs:62
7: std::sys_common::backtrace::print
at src/libstd/sys_common/backtrace.rs:49
8: std::panicking::default_hook::{{closure}}
at src/libstd/panicking.rs:204
9: std::panicking::default_hook
at src/libstd/panicking.rs:224
10: rustc_driver::report_ice
11: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:474
12: std::panicking::begin_panic
13: rustc_errors::HandlerInner::bug
14: rustc_errors::Handler::bug
15: rustc::util::bug::opt_span_bug_fmt::{{closure}}
16: rustc::ty::context::tls::with_opt::{{closure}}
17: rustc::ty::context::tls::with_opt
18: rustc::util::bug::opt_span_bug_fmt
19: rustc::util::bug::bug_fmt
20: rustc_mir::borrow_check::universal_regions::UniversalRegionIndices::to_region_vid::{{closure}}
21: rustc_mir::borrow_check::type_check::constraint_conversion::ConstraintConversion::convert_all
22: rustc_mir::borrow_check::type_check::type_check
23: rustc_mir::borrow_check::nll::compute_regions
24: rustc_mir::borrow_check::do_mir_borrowck
25: rustc::ty::context::GlobalCtxt::enter_local
26: rustc_mir::borrow_check::mir_borrowck
27: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::mir_borrowck>::compute
28: rustc::dep_graph::graph::DepGraph::with_task_impl
29: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::force_query
30: rustc::ty::query::force_from_dep_node
31: rustc::dep_graph::graph::DepGraph::try_mark_previous_green
32: rustc::dep_graph::graph::DepGraph::try_mark_green
33: rustc::dep_graph::graph::DepGraph::try_mark_green_and_read
34: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
35: rustc_mir::interpret::eval_context::InterpCx<M>::load_mir
36: rustc_mir::const_eval::eval_queries::const_eval_raw_provider
37: rustc::ty::query::__query_compute::const_eval_raw
38: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::const_eval_raw>::compute
39: rustc::dep_graph::graph::DepGraph::with_task_impl
40: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
41: rustc_mir::const_eval::eval_queries::const_eval_validated_provider
42: rustc::ty::query::__query_compute::const_eval_validated
43: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::const_eval_validated>::compute
44: rustc::dep_graph::graph::DepGraph::with_task_impl
45: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
46: rustc_mir::const_eval::eval_queries::const_eval_validated_provider
47: rustc::ty::query::__query_compute::const_eval_validated
48: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::const_eval_validated>::compute
49: rustc::dep_graph::graph::DepGraph::with_task_impl
50: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
51: rustc::mir::interpret::queries::<impl rustc::ty::context::TyCtxt>::const_eval_poly
52: rustc_typeck::check::expr::<impl rustc_typeck::check::FnCtxt>::check_expr_kind
53: rustc_typeck::check::expr::<impl rustc_typeck::check::FnCtxt>::check_expr_with_expectation_and_needs
54: rustc_typeck::check::expr::<impl rustc_typeck::check::FnCtxt>::check_expr_coercable_to_type
55: rustc_typeck::check::expr::<impl rustc_typeck::check::FnCtxt>::check_expr_kind
56: rustc_typeck::check::expr::<impl rustc_typeck::check::FnCtxt>::check_expr_with_expectation_and_needs
57: rustc_typeck::check::FnCtxt::check_block_with_expected
58: rustc_typeck::check::expr::<impl rustc_typeck::check::FnCtxt>::check_expr_kind
59: rustc_typeck::check::expr::<impl rustc_typeck::check::FnCtxt>::check_expr_with_expectation_and_needs
60: rustc_typeck::check::expr::<impl rustc_typeck::check::FnCtxt>::check_return_expr
61: rustc_typeck::check::check_fn
62: rustc::ty::context::GlobalCtxt::enter_local
63: rustc_typeck::check::typeck_tables_of
64: rustc::ty::query::__query_compute::typeck_tables_of
65: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::typeck_tables_of>::compute
66: rustc::dep_graph::graph::DepGraph::with_task_impl
67: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
68: rustc::ty::<impl rustc::ty::context::TyCtxt>::par_body_owners
69: rustc_typeck::check::typeck_item_bodies
70: rustc::ty::query::__query_compute::typeck_item_bodies
71: rustc::dep_graph::graph::DepGraph::with_task_impl
72: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
73: rustc_typeck::check_crate
74: rustc_interface::passes::analysis
75: rustc::ty::query::__query_compute::analysis
76: rustc::dep_graph::graph::DepGraph::with_task_impl
77: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
78: rustc::ty::context::tls::enter_global
79: rustc_interface::interface::run_compiler_in_existing_thread_pool
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: rustc 1.43.1 (8d69840ab 2020-05-04) running on x86_64-unknown-linux-gnu
note: compiler flags: -C debuginfo=2 -C incremental --crate-type lib
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [mir_borrowck] borrow-checking `S::<'a>::new::{{constant}}#0`
#1 [optimized_mir] processing `S::<'a>::new::{{constant}}#0`
#2 [const_eval_raw] const-evaluating `S::<'a>::new::{{constant}}#0`
#3 [const_eval_validated] const-evaluating + checking `S::<'a>::new::{{constant}}#0`
#4 [const_eval_validated] const-evaluating + checking `S::<'a>::new::{{constant}}#0`
#5 [typeck_tables_of] type-checking `S::<'a>::new`
#6 [typeck_item_bodies] type-checking all item bodies
#7 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error
Nightly:
error: internal compiler error: free_scope: DefId(0:9 ~ bugr[a70b]::{{impl}}[0]) not recognized by the region scope tree for None / Some(DefId(0:12 ~ bugr[a70b]::{{impl}}[0]::new[0]))
thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', src/librustc_errors/lib.rs:366:17
stack backtrace:
0: backtrace::backtrace::libunwind::trace
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
1: backtrace::backtrace::trace_unsynchronized
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
2: std::sys_common::backtrace::_print_fmt
at src/libstd/sys_common/backtrace.rs:78
3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
at src/libstd/sys_common/backtrace.rs:59
4: core::fmt::write
at src/libcore/fmt/mod.rs:1069
5: std::io::Write::write_fmt
at src/libstd/io/mod.rs:1537
6: std::sys_common::backtrace::_print
at src/libstd/sys_common/backtrace.rs:62
7: std::sys_common::backtrace::print
at src/libstd/sys_common/backtrace.rs:49
8: std::panicking::default_hook::{{closure}}
at src/libstd/panicking.rs:198
9: std::panicking::default_hook
at src/libstd/panicking.rs:218
10: rustc_driver::report_ice
11: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:481
12: std::panicking::begin_panic
13: <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop
14: core::ptr::drop_in_place
15: <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop
16: core::ptr::drop_in_place
17: rustc_interface::interface::run_compiler_in_existing_thread_pool
18: scoped_tls::ScopedKey<T>::set
19: rustc_ast::attr::with_globals
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: rustc 1.45.0-nightly (a74d1862d 2020-05-14) running on x86_64-unknown-linux-gnu
note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type lib
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
end of query stack